Question

What is the
energy of a 70 kg man running at 4 m/s? How
much energy does the man have? *

Answer 1

560J

Step-by-step explanation:

Given parameters:

Mass of the man = 70kg

Velocity = 4m/s

Unknown:

The amount of energy the man has = ?

Solution:

Energy is the ability to do work by a body. A body in motion is said to have kinetic energy and this can be derived using the expression below:

K.E =
`(1)/(2)` m v²

m is the mass

v is the velocity

Insert the parameters and solve;

K.E =
`(1)/(2)` x 70 x 4² = 560J